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Magnetic Coupling for a 10 kW Tidal Current Turbine: Design and Small Scale Experiments

Author

Listed:
  • In-cheol Kim

    (Korea Maritime & Ocean University Research Institute of Maritime Industry, Korea Maritime and Ocean University, Busan 49112, Korea)

  • Joji Wata

    (Department of Mechanical Engineering, Graduate School, Korea Maritime and Ocean University, Busan 49112, Korea)

  • Watchara Tongphong

    (Department of Mechanical Engineering, Graduate School, Korea Maritime and Ocean University, Busan 49112, Korea)

  • Jong-Su Yoon

    (Energy Environment Center, Busan, Korea Marine Equipment Research Institute, Busan 49112, Korea)

  • Young-Ho Lee

    (Korea Division of Mechanical Engineering, Korea Maritime and Ocean University, Busan 49112, Korea)

Abstract

This paper presents a coupling design that improves water tightness of a marine current turbine (MCT). The coupling is numerically analyzed and incorporated into the design of an MCT from a previous study. The performance of the MCT with the magnetic coupling is compared to the previous results in small scale turbine experiments. The results show that the new design is water tight and has lower mechanical losses when compared with previous results. The new turbine has increased maximum power output (from 116 W to 122 W) and hydrodynamic coefficient of power (Previously 0.45 to 0.46). Using these results, the coupling design is scaled for a 10 kW MCT and further analyzed by finite element analysis. The results obtained show that the magnetic coupling is capable of withstanding the combined weight of the hub and blade assembly. The results in this study will be used for developing a prototype for deployment in real seas.

Suggested Citation

  • In-cheol Kim & Joji Wata & Watchara Tongphong & Jong-Su Yoon & Young-Ho Lee, 2020. "Magnetic Coupling for a 10 kW Tidal Current Turbine: Design and Small Scale Experiments," Energies, MDPI, vol. 13(21), pages 1-20, November.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:21:p:5725-:d:438797
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    References listed on IDEAS

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    1. Rourke, Fergal O. & Boyle, Fergal & Reynolds, Anthony, 2010. "Marine current energy devices: Current status and possible future applications in Ireland," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(3), pages 1026-1036, April.
    2. Lee, Nak Joong & Kim, In Chul & Kim, Chang Goo & Hyun, Beom Soo & Lee, Young Ho, 2015. "Performance study on a counter-rotating tidal current turbine by CFD and model experimentation," Renewable Energy, Elsevier, vol. 79(C), pages 122-126.
    3. Do-Seong Byun & Deirdre E. Hart & Woo-Jin Jeong, 2013. "Tidal Current Energy Resources off the South and West Coasts of Korea: Preliminary Observation-Derived Estimates," Energies, MDPI, vol. 6(2), pages 1-13, January.
    4. Kim, Gunwoo & Lee, Myung Eun & Lee, Kwang Soo & Park, Jin-Soon & Jeong, Weon Mu & Kang, Sok Kuh & Soh, Jae-Gwi & Kim, Hanna, 2012. "An overview of ocean renewable energy resources in Korea," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(4), pages 2278-2288.
    5. Su-jin Hwang & Chul H. Jo, 2019. "Tidal Current Energy Resource Distribution in Korea," Energies, MDPI, vol. 12(22), pages 1-15, November.
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    7. Dong-Hui Ko & Jaekwan Chung & Kwang-Soo Lee & Jin-Soon Park & Jin-Hak Yi, 2019. "Current Policy and Technology for Tidal Current Energy in Korea," Energies, MDPI, vol. 12(9), pages 1-15, May.
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    Cited by:

    1. Wenbin Su & Hongbo Wei & Penghua Guo & Qiao Hu & Mengyuan Guo & Yuanjie Zhou & Dayu Zhang & Zhufeng Lei & Chaohui Wang, 2021. "Research on Hydraulic Conversion Technology of Small Ocean Current Turbines for Low-Flow Current Energy Generation," Energies, MDPI, vol. 14(20), pages 1-19, October.

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